Socketed Cards

Introduction
Some cards have sockets. If you insert a gem in the socket and pay for the gem's costs, then you get the gem's benefits. For example, Rotting Knight is a 2/1 zombie that costs resources and has  thresholds. If you insert a white gem and you have a white threshold, then it becomes a 2/3 zombie. But if you insert a red gem and have a red threshold, then it becomes a 2/1 zombie with. So you can customize socketable cards however you like.

You can find a complete list of socketable cards at Hex TCG browser and Hex card search engine.

Gems
There are currently 20 gems in standard format. They rotate every 2 seasons.

Rules
For both PvP and PvE:
 * You cannot use more than 4 copies of each gems per deck.
 * You can insert major gems in minor sockets, but not vice versa.
 * If you don't pay the gem's costs, then you won't get the gem's benefits, but you can still play the card normally.
 * If you create a socketable card in battle, then it will have a random gem with your threshold.

For PvP:
 * You can change gems between rounds like you change reserved cards.

For PvE:
 * Some computers use different gems than we do.